EGR Control Solenoid
WARNING: This page does not describe the selected car, but rather 22 other vehicles, including the 2021 Kia Sorento, 2020 Kia Soul, 2020 Kia Optima, 2020 Kia Niro, and 2019 Kia Optima. However, it is still accessible from the selected car via links, so may be relevant.
Disconnect vacuum hoses from EGR control solenoid. Attempt to blow air through solenoid. No air should pass. Using jumper wires, apply battery voltage to solenoid. Again, attempt to blow air through solenoid. Air should pass. If solenoid does not function as specified, replace solenoid.